Brake-shoe.



G. W. ARMBRUST.

BRAKE SHOE.

APPLICATION FILED MAY 29, 1911.

1,020,532. Patented Mar. 19,1912.

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BRAKE SHOE.

APPLIOATION FILED MAY 29, 1911.

Patented Mar. 19, 1912.

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BRAKE SHOE. 1 APPLICATION FILED MAY 29, 1911.

Patented Mar. 19, 1912.

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CHARLES W. ARMBRUST, 0F CRYSTAL LAKE, ILLINOIS, ASSIGNOR OF ONE-HALF TOHARRIET W. ARMBRUST, OF NORTH CRYSTAL LAKE, ILLINOIS.

BRAKE-SHOE.

Specification of Letters Patent.

Application filed May 29, 1911.

Patented Mar. 19, 1912.

Serial No. 630,148.

nnus'r, of Crystal Lake, in the county of McHenry and State of Illinois,have invented certain new and useful Improvements in Brake-Shoes, ofwhich the following is a specification. i

This invention relates to brake shoes and particularly to that class ofshoes known as interlocking shoes, said shoes being so constructed thatthe back of one shoe may be locked to the face of the other shoe'whercbywhen one of said shoes is partially worn away it may be locked to theface of a new shoe so that the partially worn shoe can be entirely usedup.

One of the objects of my present invention to provide two shoes of thischaracter which can be interchangeably used, each of said shoes beingadapted to be locked either to the face or the back of another shoe andalso to provide a detachable attaching lug which, when in lookingposition, will engage or interlock with both of said shoes and therebylock them together.

My'invention will be best understood by reference to the followingdescription when taken in connection with the accompanying drawingsillustrating preferred einbodiments thereof.

Referring to the drawings Figure 1 is a side elevation of a pair ofshoes embodying my invention showing the attaching lug engagedtherewith; Fig. 2 is a back view of one of said shoes; Fig. 3 is a faceview thereof; Fig. 4 is a sectional view on the line 4% of Fig. 1 Fig. 5is a side elevation of a pair of shoes of modified form showing a brakehead connected therewith; Fig. 6 is the back view of one of said shoes;Fig. 7 is a face view thereof; F ig. 8 is a sectional view on the line8-8 of Fig. 5; Fig. 9 is a side elevation of a pair of shoes of stillanother form; Fig. 10 is a back view of one of the shoes shown in Fig. 9with the detachable attachin lug en aged therewith; Fig. 11 isa bac View0 the other shoe shown in Fig.v 9; Fig. 12 is a sectional view on theline 12-12 of Fig. 9; and Fig. 13 is a sectional view similar to Fig. 12but showing the shoes in reversed position.

Referring to the drawings and particularly Figs. 1 to 4 thereof,reference character 15 indicates the body of one form of my improvedshoe shown as equipped on its back with transversely extending lockinglugs 16 and on its face with locking recesses 17 adapted to receive thelocking lugs of a similarly shaped shoe.

18 designates the body of a partially worn shoe shown in Fig. l ashaving its locking lug interlockingly engaged in the locking recesses ofthe body 15. These shoes are adapted to be interlockingly engageduponrelative transverse movement thereof and it will be apparent fromFigs. 2 and 3 that the locking lugs 16 extend only partially across theback of the body portion while the locking recesses 17 likewise extendonly partially across the face of the body, said recesses being open atone end to receive the locking lugs 16 of a similar shoe and closed attheir other ends to prevent the shoe from becoming laterally displacedin that direction.

Each of the shoes is equipped on its back and adjacent one side thereofwith a centrally disposed attaching stud 19 projecting upwardly from thebody of the shoe and having its outer face undercut or grooved asindicated at 20. The opposite side of the shoe has a recess 21 formedtherein to re-' ceive the locking stud 19 of a similarly shaped shoewhen the shoes are interlockingly engaged upon relative lateral movement thereof. The end walls of this recess are undercut as indicated at22 to form a locking engagement with the tapered ends of the attachingstud whereby the upper shoe willbe held to the brake head by theattaching stud when the lower wearing shoe has entirely worn away.

A detachable attaching lug 23 is formed with two legs 24 and 25respectively, the leg 25 being provided with a head or rib 26 adapted toengage in the groove 20 of the attaching stud on the upper shoe and thelonger leg 24 being provided with a rib or projection 27 adapted toengage in the groove 20 of the attaching stud on the lower shoe whereby,when the attaching lug is locked to a brake head by an ordinary lockingor attaching key, both of the shoes are securely attached to the brakehead. The

detachable attaching lug 23 is engaged with the attaching studs 19 bylongitudinal movement thereof relatively to the shoes, and in tr e lowershoe and then slid into locking position. v

in order to strengthen the leg 25 of the ate. taching lug, a web 29 isformed at one' end thereof connecting said leg with the crown of the lugand the studs 19 are notched or cut away at each end, as indicated at30, to receive this web and permit the ribs 26, 27 to engage throughouttheir length in the grooves 20. I

Tn the form of my invention shown in 5 to 8 inclusive, the shoes 31 areprod on their backs with locking lugs 32 and on their faces with lockingrecesses 33 adapted to receive said lugs whereby the shoes may heinterlocked upon relative longitudinal movement thereof. In this instance, each of the shoes 13 provided with attaching studs 34 and 34 andalso with a perforat on or opening 35 to receive the 1 longer attachingstud of a similarly shaped shoe, said opening 35 being of greater lengthlongitudinally otthe shoe than the stud to 3 permit relativelongitudinal movement of the shoes whereby they are locked together. Theattaching studs 3a, in this instance, project upwardlyfrom the back ofthe shoes far enough to pass entirely through the body of the upper shoeand they are provided with undercut locking shoulders "36 which areengaged by undercut shoulders'provlded on the detachable attaching lug37. The at 'taching lug is disposed entirely above the hack of the uppershoe and is brought into interlocking engagement with the {attachingstuds by moving the same longitudinally of he shoes until the undercutshoulders are engaged with the studs as shown in Fig. 8. The brake head38, as shown'in Fig. 5, is of the ordinary M. (1 B. type and the shoesare fastened thereto by an ordinary locking or fastening key (notshown). In this form of 'niy invention the side walls or openings 35 areslightly undercut and the side walls of the attaching studs 34: arecorrespondingly tapered so that the stud on the lower shoe can not bedrawn uowardly through the upper shoe to release he attaching lug if thelower shoe should be entirely worn away.

In the form of my invention shown in Figs. 9 to 13 inclusive, the shoes39 and 4:0 ,difi'er from one another in the form of attaching stud withwhich they are equipped. Each of the shoes, however, is provided onaoaussa its back with looking lugs 41 and on its face with similarlyshaped locking recesses 42 with which the locking lugs interlockinglyengage upon relative longitudinal movement of the shoes.

' The shoe 39 is provided on its back, near attaching studs 43, whichproject upwardly at their upper ends with inwardly projecting shoulders44:. This shoe is also provi ed at its center with an opening 45 taperedfrom its bottom upwardly as indicated in Figs. 12 and 13. The shoe 40 iscut away at the center on each side to form recesses 46 adapted toreceive the studs 43 of the shoe 39 as shown in Fig. 13. The shoe 40 isalso provided on its back with a centrally disposed stud 47 providedwith undercut walls. An attaching lug 48 is provided on its bottom withan undercut recess 49, the inclined walls of which are adapted tointerlockingly engage with the undercut walls of the stud 47' and isalso provided at its sides with notches or recesses 50 adapted to engagewith the inclined shoulders at of the studs 43. This constructionenables the attaching lug d8 to'be interlockingly engaged with both theshoe 39 and the shoe 40 as shown in Fig. 13. The lug is also proed toreceive the ordinary locking key which fastens the shoes to a brakehead.

The shoes when lockingly assembled may be locked together as shown inFig. 13 and fastened to a brake head. After the shoe 39 has been wornaway, it is desirableto secure a new sl1oe 39 to the brake head and toplace the shoe 40 on the face thereof so that it in turn will act as thewearing shoe.

shoes, the upper cornersof the attaching lug ingly engage with theshoulders 4A: of the studs 43 and an auxiliary lug 53, having anundercut stud 54 at its upper end and an ployed. This auxiliary lug isinterlockingly engaged with thestud 47 of the shoe 4:0 by

jected through the tapered opening '45 of the shoe 39. The detachableattaching stud 48 is then slid into position longitudinally of the shoesso that-the undercut recess 49 jecting above the back of the shoe 39 asshown in Figs. 9 and 12. The side walls of the auxiliary lug 53 aretapered to fit in the tapered opening 4:5 so that when the shoe 40isentirely worn awaythe auniliary'lug will assist in holdi the shoe 39to the attaching lug. It wil thus be apparent that the attaching lug-48is adapted for interlocking' ,erigagementwith looth the shoe 39 and 'oratvthe middle and adjacent each side, with frqm the body of the shoe andare eqluppcd in order to effect this arrangement of the.

are cut away as indicated at 52 to interlock means of the undercutrecess 55 and is prowill lockingly engage with the stud 54: pro- ,videdwith a key receiving opening 51 adaptreverse the position of the shoes,that is, to; i

undercut recess 55 at its lowertace, is emthe shoe 40 to lock themtogether and fasten them to the brake head irrespective of which shoe isplaced at the back and it will also be obvious that the shoes can beinterchangeably employed, the partially worn shoe in each instance beingsecured to the face of a new shoe.

While I have shown and describedpre- 't'erred embodiments of myinvention, it will be obvious that various modifications in the size,shape and proportion of the various parts may be resorted towithoutdeparting from the spirit or sacrificing any of the ma terialadvantages of my invention.

I claim:

1. The combination of'a b 'ake shoe, provided with an attaching stud, asecond brake shoe interlocked therewith and provided with an attachingstud, and a detachable attaching lug interlockingly engaged with theattaching studs of both of said shoes.

2. The-combination of a brake shoe provided with an attaching stud andshaped to receivethe attaching stud of a similarly shaped shoe, and anattaching lug detachably engaged with the attaching studs of both ofsaid shoes.

3. The combination of a brake shoe provided with an attaching .stud andhaving a recess to-rec eive the attaching stud of a similarlyishapedshoe, a second shoe engaged with said first shoe and havingits attachingstud disposed in said recess, and an attaching lug detachably engagingboth of said studs. i

t. A- brake shoe provided with locking lugs and a locking stud andhaving locking recesses on its face, a second shoe having locking lugsengaged in the locking recesses of said first shoe and also providedwith a locking stud, and a detachable attaching lug iuterlockinglyengaged with the studs of both of said shoes.

The combination of a brake shoe provided with a centrally disposedattaching stud and locking lugs disposed on each side thereof, a secondshoe interlockingly engaged with said first shoe and having an attachingstud projecting through said first shoe and disposed within theperimeter thereof, and an attaching lug detachably engaged with theattaching studs of both of said shoes.

6. The combination of a brake shoe pro vided with an attaching stud andhaving an attaching stud-receiving recess, a second shoe locked to saidfirst shoe and having a locking stud disposed in said' recess, and anattaching lug interlockingly engaged with the studs of both of saidshoes.

7. A brake shoe provided with an attach ing stud, a second shoe havingan attaching stud projecting through the body'of said first shoe withinthe perimeter thereof, and a detachable attaching lug interlockinglyengagedwith both of said studs whereby the shoes are locked together.

8. The combination of a pair of brake shoes each provided with anattaching stud, the stud of one of said shoes projecting through thebody of the other shoe, and an attaching lug engaged with both of saidstuds whereby the shoes are locked together.

9. A brake shoe provided with an attaching stud, a second brake shoealso provided with an attaching stud, said shoes being constructed sothat the attaching stud of one shoe maybe inserted through the body ofthe-other shoe, and a detachable attaching lug adapted to be engagedupon movement thereof longitudinally of the shoes with the attachingstuds of both shoes whereby the shoes are locked together.

10. The combination of a pair of brake shoes each provided with anattaching stud projecting upwardly from the back thereof,

one of said shoes being provided with a recess to receive the upwardlyprojecting stud of the other shoe, and an attaching lug adapted to beengaged with the studs of both of said shoes to lock the same together.

11. The combination of a pair of brake shoes, and a detachable attachinglug engaged with each of said shoes.

12. The combination of a pair of brake shoes, and a detachable attachinglug engaging directly with each. of said shoes.

13. The combination of a pair of brake shoes, each provided with anattaching stud, and an attaching lug detachably engaged with the studsof both shoes.

let. The combination of a plurality of brake shoes, each provided withan attaching stud, anda detachable attaching lug engaged with the studsof each shoe.

15. The combination of a pair of brake shoes, each provided with anattaching stud projecting upwardly from the back thereof, and with arecess adapted to receive the upwardly projecting stud of a similarlyshaped shoe, the end walls of said studs and recesses being inclinedwhereby the stud of the \vearingshoc will assist in retaining the backshoe in position. i

16. A brake shoe comprisinga body portion provided with a recess, andhaving an attaching stud projecting upwardly from the back thereof, onewall of said stud and recess being inclined whereby, upon interlockingengagement of similarly shaped shoes, the back shoe will be at leastpartially retained by the lug of the wearing shoe.

.17. 'A brake shoe comprising a body portion provided with a studprojecting therefrom, and having a recess adapted to receive the stud ofa similarly shaped shoe,.the said body portion adjacent said recesshaving a depression to accommodate a detachable attaching lug. i

18. The combination of a pair of brake shoes, each provided with anattaching stud, and having a'reoess open at one side to receive the studof a similarly shaped shoe, and a detachable attaching lug adapted to beengaged with the studs 023 both of said. shoes to look the shoestogether against relative lateral d5splaeemehh V 19 1e"*oombination[ ofa'pair of brake shoes, each provided with a rearwardly pro.-

jecting stud and having a recess open at one side to receive the stud asimilarly shaped shoe, and a detachable attaching lug having a slidingengagement with the studs of both of said shoes whereby the shoes arelocked together and secured to a brake head.

20. A detachable attaching lug for brake shoes having legs or prongsadapted for sliding engagement with the attaching studs of the brakeshoes, one of said legs or prongsbeing connected with the main bodyportion of the lug by a flange or Web.

IRA J. VVILSON, G. E. HOLMES.

'dopies up? this patent may bblfi'flifilfifi for five cents each, byaddressing the Commissioner of Patents,

Washington, B; G.

